The element oxygen consists of three naturally occurring isotopes: 16O, 17O, and 18O. The atomic mass of oxygen is 16.0 amu. What can be implied about the relative abundances of these isotopes?
◦ More than 50% of all O atoms are 17O.
◦ Almost all O atoms are 18O.
◦ Almost all O atoms are 17O.
◦ The isotopes all have the same abundance, i.e. 33.3%.
◦ The abundances of 17O and 18O are very small.